## Typical Automotive DTCs

### P0420 Catalytic Converter Issue

– Frequent Reasons:

Exhaust leaks [1]

– Common Solutions:

Replace catalytic converter https://carautorepair.site/

### P0171 Air-Fuel Ratio Error

– Potential Issues:

Vacuum leaks

– Diagnostic Steps:

Check fuel pressure [1][7]

## Car Maintenance Terms

### ABS (Anti-Lock Brake System)

– Purpose: Prevents wheel lockup [7]

### ECM/ECU (Engine Control Module)

– Responsibility: Manages fuel injection [7]

### Transmission System Parts

– Includes: Drive axles [7]

## Service Procedure Stages

1. **Problem Identification**:

Conduct road test

2. **Part Evaluation**:

Check voltage

3. **Parts Replacement**:

Follow torque specs

4. **System Validation**:

Confirm warning light reset

## Necessary Equipment

| **Tool Type** | **Examples** | **Purpose** |

|—|—|—|

| Diagnostic Scanner | Innova | Live data streaming |

| Physical Equipment | Torque wrench | Component repair |

## Service Information References

### Mechanical Information System

– Capabilities:

Wiring diagrams [8]

Technical illustrations

### Mobile Applications

– Vehicle Service App:

Electrical diagrams [5]

## Budget Repair Strategies

– Preventative service avoids costly repairs

– Understand DTC meanings to prevent mechanic overselling

– Use aftermarket parts when budget constrained [7]

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